An NBA basketball rim is 10 feet off the floor on which the game is played, and measures a diameter of 18 inches. In order to score a field goal in basketball, players must throw the ball through the rim and the attached net.
An NBA court is typically divided into two sections by a midcourt line, and each half exactly mirrors the other. A complete court is 94 feet long and 50 feet wide. The rim and the net are attached to a backboard which measures 6 feet wide and 2 1/2 feet tall, and the backboard contains a rectangular space of 24 inches wide and 18 inches tall which is often used by the players to gauge whether the basketball will enter the rim and the player will score.
Other important terminology used in basketball include backcourt, which is the side of the court used by the defensive side of the team. The baseline, or the endline, is the line at each end of the court, where the center of the basket is 5 feet 3 inches' from the endback line. The center circle is the circle in the middle of the court, 12 feet in diameter where the tipoff at the beginning of the game takes place.